The osmotic pressure, after re-solution, of serum dried from the frozen state (F.D. serum)

Abstract

Comparative measurements are recorded of the osmotic pressures of human and rabbit sera, both fresh and re-dissolved after drying from the frozen state (F.D. sera).The process of drying did not alter the osmotic properties of the serum proteins.The view that drying from the frozen state does not cause denaturation of the serum proteins is supported also by the facts that the refractive indices and the membrane potentials remained unchanged.

The effects on renal resistance to blood flow of renin, angiotonin, pitressin and atropine, hypertension, and toxemia of pregnancy

“…From them have been selected those cases in which calculation showed the glomerular intracapillary pressure to be less than blood pressure. It is possible that our formula for glomerular intracapillary pressure, which depends on the Adairs' and Greaves' observations on osmotic pressure of diluted serum (8), is incorrect at high degrees of hemoconcentration. There are technical-difficulties, too, in the measurement of renal blood flow and inulin clearance during the rapid fluctuations produced by angiotonin.…”

Formulae for Afferent and Efferent Arteriolar Resistance in the Human Kidney: An Application to the Effects of Spinal Anesthesia

“…We see, then, that if an approximation is to be made, it is wiser to neglect both the reduction in flow and the increase in viscosity of the blood in the efferent arteriole, rather than either one alone, since they tend to compensate each other. At mean basal plasma filtration fraction (19 (25) finding that Poiseuille's law applies to the hind-limb of the dog perfused with blood, but with modification. They find that the perfusion pressure plotted against the flow is a straight line with an intercept at about 20 mm.…”

The molecular weights of the proteins of normal and nephrotic sera and nephrotic urine, and a comparison of selective ultrafiltrates of serum proteins with urine proteins

“…factor, related to the albumin: globulin ratio, some 63 66 55 3 % higher than the factor used in this work. If 58 65 45 their data are recalculated with the 6-25 factor the average molecular weight obtained by Adair et al (1940) is 80 000 and that obtained by Popjak & 64 73 56 McCarthy is 82 000. These values compare with the 68 75 68 results of 77 000-79 000 reported here.…”